feat: Add ability to query demand order by id.

[omritoptix]

Description

---

Closes #607

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow-up issues.

PR review checkboxes:

I have...

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Targeted PR against the correct branch
• included the correct type prefix in the PR title
• Linked to the GitHub issue with discussion and accepted design
• Targets only one GitHub issue
• Wrote unit and integration tests
• Wrote relevant migration scripts if necessary
• All CI checks have passed
• Added relevant godoc comments

SDK Checklist

• Import/Export Genesis
• Registered Invariants
• Registered Events
• Updated openapi.yaml
• No usage of go map
• No usage of time.Now()
• Used fixed point arithmetic and not float arithmetic
• Avoid panicking in Begin/End block as much as possible
• No unexpected math Overflow
• Used sendCoin and not SendCoins
• Out-of-block compute is bounded
• No serialized ID at the end of store keys

Full security checklist here

For Reviewer:

• Confirmed the correct type prefix in the PR title
• Reviewers assigned
• Confirmed all author checklist items have been addressed

---;

After reviewer approval:

• In case the PR targets the main branch, PR should not be squash merge in order to keep meaningful git history.
• In case the PR targets a release branch, PR must be rebased.

[codecov]

Codecov Report

Attention: Patch coverage is 34.62470% with 270 lines in your changes are missing coverage. Please review.

Project coverage is 31.30%. Comparing base (463c72e) to head (302c0bb).

Files	Patch %	Lines
x/eibc/types/query.pb.go	39.93%	156 Missing and 29 partials ⚠️
x/eibc/types/query.pb.gw.go	0.00%	78 Missing and 1 partial ⚠️
x/eibc/keeper/grpc_query.go	76.00%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #608      +/-   ##
==========================================
+ Coverage   30.79%   31.30%   +0.50%     
==========================================
  Files         201      201              
  Lines       28495    28900     +405     
==========================================
+ Hits         8774     9046     +272     
- Misses      18322    18391      +69     
- Partials     1399     1463      +64     

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